EPS路感H∞控制下的频域整形方案研究  

Steering Feeling for EPS Based on H∞ Control with Varied Frequency Shaping Methods

作　　者：魏建伟[1,2] 李占东[1] 魏民祥[2] 赵万忠[2] 

机构地区：[1]宁波工程学院机械工程学院,浙江宁波315016 [2]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《机械设计与制造》2014年第1期62-64,共3页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(51375007);宁波市自然科学基金资助项目(2013A610151);"王伟明助创基金"资助(2013011)

摘　　要：电动助力转向(Electric Power Steering,EPS)系统作为一种机械传动机构,受路面扰动和传感器噪声的影响比较大,直接影响到EPS系统的转向路感。将EPS系统模型与线性二自由度整车模型相结合,建立EPS系统控制模型,并给出助力控制的目标函数。根据EPS系统的频率分布,选取两个加权函数。通过转向盘把持力矩的幅频、相频特性及单位阶跃输入响应仿真计算,研究不同加权策略时助力控制对转向路感的影响。仿真结果可知,两个加权函数共同作用可以进一步改善EPS系统转向路感。As a type of mechanical driving mechanism, Electric Power Steering （EPS） system is affected by road disturbance and sensor noise greatly, which directly influences the steering feeling of EPS system. Combing dynamic model of EPS system and the two-degree-of-freedom linear vehicle model, EPS system control model is derived, and object functions of assist control are described. According to the frequency distribution of EPS system, two weighting functians are chosen. A ccarding to the simulation calculation of amplitude, phase frequency response and unit step input for steering wheel torque, effects of different weighting strategies on steering feeling are analyzed. Simulation results indicate that steering feeling can be further improved with the interaction of the two weighting functions.

关 键 词：电动助力转向 转向路感 频域整形 H∞控制 

分 类 号：TH16[机械工程—机械制造及自动化] U461.1[机械工程—车辆工程]